[Insight-users] Masks in registrations

[Luis Ibanez]

Hi Francois,

You will find an example on the use of masked
metrics for image registration under:

   Insight/Examples/Registration/
               ImageRegistration12.cxx

This was added recently, so you probably need
to use an updated CVS checkout of ITK in order
to get the example.

In this particular example, a binary image is
used as a mask for computing the image metric by
using only a subset of the fixed image pixels.

Note that you can put masks both on the fixed
and in the moving image. In the example this is
only illustrated for the fixed image though.

You said that your mask is a list of points...

You could simply use this list of points in
order to create a binary image mask an then
follow the example in ImageRegistration12.cxx.


Please let us know if you have further questions,


   Thanks



      Luis


--------------------------
Bignalet Francois wrote:

> Hi all!
> 
> I am trying to register two images and I would like to use masks in order to avoid some areas of the images.
> 
> It would be like:
> metric->SetFixedImageMask( fixedMask);
> metric->SetMovingImageMask( movingMask);
> 
> So before the registration I need to compute the masks.
> I would like to automaticaly build the masks. For example by building a filter that would produce a mask which hide dark areas of the image. 
> 
> I tried to make a "ImageToSpatialObjectFilter" witch inherit from ProcessObject, but I have 2 problems:
> 
> -First, I dont really know which SpatialObject I have to use... My mask is not an ellipse, a line, or a well defined shape, but just a list of points.... Which SpatialObject I'd better use?
> 
> -Second, I tried to use "SceneSpatialObject" with "SpatialObjectPoint" to build my mask. But SceneSpatialObject" is not an DataObject, and so my filter witch inherit from ProcessObject can not have a SceneSpatialObject output.
> 
>  Thanks for your help!
> 
> François
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